Definitely a good movie. The first thing to know is that this is a suspense movie. This movie takes a LONG time to build up. It spends a lot time crawling through tight tunnels, which was VERY suspenseful. You could feel the claustrophobia yourself. However, if you do not like suspense driven movies (like The Blair Witch Project), then this movie is not for you. But I guarantee that if you stick around for the second half of the movie...it gets much better and you will be scared. The second thing to know is that there are two endings. The EUROPEAN version had an AMAZING ending which, for some reason, the AMERICAN version did not have. I don\'t want to spoil it, but the last 60 seconds of the movie make it SO much better and it is absolutely necessary to get the European version. The last thing you need to know is that although there it is rated R for all the gore near the end. There is no nudity. Even though it is dark and hard to see things, it is still pretty gross. All in all, despite the fact that it was a little too gross for my tastes, it was an awesome movie that had all my favorite elements of horror in it: suspense, startling, shock, twist ending, psychological breakdown and edge of your seat scariness.